Hot-air heater.



No. 705,422. Pamn'ced .luly 22, |902.

M. B. MOORE & G. W. LEDDON.

HOT AIR HEATER. (Appnemon ma am. 15, i902.)

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l Patented Ju'ly 22, |902.

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No. 705,422. Patented 'July 22, |922.

' m. B.. Moerman. w. Lennon.

HOT AIR HEATER.

(Application med nu. 15, 1902.) (lo lvodnl.) 3 Sheets--Sheet 3.

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MOSES B. MOORE, OF PENNING'ION, NEXV JERSEY, AND GEORGE W. LEDDON, OFPHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO THE PENNINGTON FOUNDRY ANDHEATER COMPANY, OF PENNING CORPORATION OE NEW JERSEY.

HOT-AIR SPECIFICATION forming part of Letters Application iled March 15,1902.

To all whom t nto/,y concern;

BeitknownthatWe,MOsEsB.MORE,resid ing in Pennington, New Jersey, andGEORGE W. LEDDON, residing at Philadelphia, Penn- Sylvania, citizens ofthe United States, have invented certain Improvements in Hot-AirHeaters, of which the following is a specification.

Our invention has for its object the-provi- Io sion of a hot-air furnacewhich shall lloe of a simple construction, efficient in action, and easyto operate. Thisobject We attain as hereinafter set forth, referencebeing had to; the accompanying drawings, in which- Figure 1 is avertiealsectional viewof our improved furnace. Fig. 2 is a horizontalsectional view on the line 2 2, Fig. l; and-Fig. 3 is an Outside view ofthe innermost casing, portions of the outer casing being removed for theclearer illustrationof said inner casing. In the above drawings,Aisvthecircularbase of the heater, preferably of cast-iron, upon which is arectangular ash-box B, itsv backI plate being shown in sectionY in Fig.lV at 00 and carried by and preferably formed lintegral with the sidesof the ash-box is afplate h, extending inwardly around the topedgethereof and forming the support for theii'rebrick lining h2 and thegrate b, a rectangular opening being formed in the front of the ashboxand a frame b4 Iextetiding forwardly around said opening and formingaldoorway4 thereinto. V

Preferably made integral with the ash-box' and running around its backand two sides is a smoke-.line C, connecting with the smoke pipe orstack C at the back of the heater through a horizontal pipe c, said lineextending around the ash-box B, its forward ends 4o nallyi'ntersectingthe frame h4, which forms the entrance into the ash-pit and is providedwith doors h3, whereby access may be had to the interior of said Hue.

Resting upon the top surface of the smokelue C arethree-.corrugatedsections E, forming the back and two vsides of there-box of the heater, the front being formed by a flat plate E, providedwith a projecting ex- *ofthe products of co TON, NEW JERSEY, A

HEATER.

Patent No. 705,422, dated July 22, 1902.

serai No. 98,372. (No man tension e, forming a box-like frame of rec-'tangularsection'which serves as the fuel-door- 5o Way',

The top ofthe smoke-flue C is formed With a number of openings,corresponding in outline tothe.V outline-of the corrugations of the sideand back sections E, which rest upon said flue, and there are a numberof plates czsuitably fastened to the fronts of these corrugations andextendingto thetop of the sections E. There are thus formed iiues whichare in Vcommunication with the interior of the o smoke-'line G at eachside and at the back of the fire-box.

A cover;or dome section 'F is provided, which rests d-irectly upon andcorresponds in outline to the three side and back sections E 55. and thefront section E of the heater, its sidesand back being made corrugated,and thereby forming entrance-Ways or openingsf z"to the vertical luesformed by the plates c2 and the corrugations in the side and back sec-7o tions*v E. This dome-section lis conned to the rectangular fire-boxin any suitable Inanner, and there is an opening f in its top surface,towhich is connected a pipe f2, commu- ,nicating with the main smoke-stackOQ there being a damper f3 for controlling the passage mbustion throughsaid pipe.

We preferably form the ash-box, the sections of the fire-box, and thedomeabove de- 8o scribed of cast-iron.

Closely surrounding the casing formed byv the sections'of the fire-boxis a second casing G, of galvanized iron, this casing being carried by aring b5 and extending to the same 85 height as that of the sections E.It is to be understood that thetop surface of the smokeiiue C has in ita number of depressions at c3 c3, as shownin Fig. 3, and inasmuchasthecasing G does not extend below the `level of 9o the top of thesmoke-boxe thesedepressions c3 form a number of entrances jor-openingsinto the vertical passage-Ways formed by the outwardly-openingcorrugations of the sections E and the said casing G. The third andoutermost casing H of the heater rests upon the base-piece A and ring b5and completely envelops the parts heretofore described. Hence there isformed between the casing and the sides of the ash-box an inclosed spaceM, which serves as a reservoir for cold air. A pipe h from a. suitablesource of cold-air supply enters this space at the side of the heater,as shown, and one or more pipes, as h, at the top of the casing Hconduct the heated air from the casing to any desired points ofdistribution. It will be seen that the ring b5 extends outwardly to thecasing H and is perforated, as at h2, to allow air to circulate betweenthe casings Gr and H.

In the front of the heater an ornamental plate I is preferably let intothe outside casing H, being provided with fire and ash doors t' and t',which suitably t over the projecting doorways@ and b3 from the section Eand the ash-box Brespectively.

lVhen lighting the fire in the furnace or when rapid combustion isdesired, the damper]v3 is opened and the hot gases rising at the top ofthe inside casing E E pass into the stack C through the short pipe f2.Ordinarily, however, this damper f3 is closed, and the heated gas afterrising to the top of the interior casing enters the openings ff andpasses down through the fines formed in the corrugated portions of theside and back sections E. From these the hot gas enters the horizontalsmoke-Hue C and passing backwardly toward the rear of the heater entersthe base of the stack O' through the pipe 0'. The downflowing gasthrough the corrugations of the sections E, as well as the direct heatfrom the fire on the parts of the corrugated sections between the platesc2, heats the air between the casing G and the said q corrugatedsections, causing it. to rise and draw additional air from the reservoiraround the ash-box through the openings formed by the depressions e3 inthe smoke-line C and between the latter and the bottom of the casing G.By the provision of the air-reservoir around the exterior of the ash-pitthere is always a large volume of cold air ready to be drawn up intocontact with the heated portions of the corrugated rectangular casing,thus allowing the said air to be quickly heated and discharged.

By making the sections E similar they will be interchangeable, therebeing thus required a minimum number of patterns when manufacturingvarious parts of the heater.

IVe claim as our inventionl. The combination in a hot-air furnace, of arectangular fire-box having sides formed of corrugations of differentsizes, a cover for the same, a smoke-flue, a substantially circularcasing closely surrounding the fire-box the external contour of thecorrugated sides of the fire-box conforming to the shape of said casin gand forming air-passages therewith, a stack connected with thesmoke-flue, and a third casing surrounding the whole, the same having aninlet and an outlet for air to be used for heating, substantially asdescribed.

2. The combination of a casing of polygonal section having corrugationsupon its sides, the same forming alternate smoke and air passages, aconduit communicating with said smoke-passages, certain of saidcorrugations being of different size and shape from the others andarranged so that the casing as a whole is of substantially cylindricalform, with a second casing also of cylindrical form closely surroundingthe first casing and its corrugations, substantially as described.

3. In a hot-air furnace, the combination of a fire-box having corrugatedsides, a cover therefor having corrugated edges, plates covering certainof the corrugations in the sides of said re-box and thereby formingflues, the corrugations of the cover registering with the corrugationsof the fire-box and providing openings thereinto, a smoke-stack asmokeue extending around the lower part of the said fire-box andconnected to passages therein, a second casing around the fire-boxforming air-passages with certain others of the corrugations of the sameand a third casing surrounding the whole and provided with an inlet forcold air and an outlet for the heated air, substantially as described.

4. In a hot-air furnace, the combination of an ash-box, a smoke-Hueextending around the top thereof, a single casing having corrugatedsides forming the tire-box and a cover supported by said fire-box,certain of the corrugations being constructed to form smokepassages, thesame being in communication vwith the interior of the casing and withthe smoke-flue, a stack connected tovsaid flue, a second casingsurrounding the fire-box and forming air-passages with certain others ofthe corrugations of the sides thereof and a third casing surrounding thewhole and having an inlet and an outlet for the air, substantially asdescribed.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing Witnesses.

MOSES B. MOORE.

GEO. W. LEDDON.'

Vitnesses:

JOHN C. EGE, OLIVER B. GRAY.

ICO

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